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**Bob B.** · 01-24-2008, 02:01 PM

Bob-- knew the 6at was an onan motor... I've heard of some 6at swaps into 4x4 rigs and people seem to like 'em, what kind of problems do you know of on this motor? I respect you ASE guys.

Thanks for that! As for the A series Cummins, UPS ran a bunch of them in the late 80's-early 90's time frame. Too many failed, and the Brown Guys replaced a lot of them with CNG 4.3L Chevy V-6's. In all fairness, it might be O.K. for what you want to do with it. The engine was just built a bit light for commercial service.

01-24-2008, 02:01 PM	#21
Bob B. Senior Member Join Date: Aug 2005 Location: Los Angeles Posts: 1,395	Re: Diesel Conversion Bob-- knew the 6at was an onan motor... I've heard of some 6at swaps into 4x4 rigs and people seem to like 'em, what kind of problems do you know of on this motor? I respect you ASE guys. Thanks for that! As for the A series Cummins, UPS ran a bunch of them in the late 80's-early 90's time frame. Too many failed, and the Brown Guys replaced a lot of them with CNG 4.3L Chevy V-6's. In all fairness, it might be O.K. for what you want to do with it. The engine was just built a bit light for commercial service. __________________ 1967 GMC CM-2500 Camper Cruiser, 351E V-6, NP 435 4 speed, Dana 60, and factory A/C. 2012 GMC K-3500 WT regular cab, 6.0L Vortec, 6L90.